Application Examples > High-speed interrupt

High-speed interrupt

An FBs-PLC can have up to 16 points of external interrupt inputs. The interrupt can be activated by the change of input status which can be positive edge/negative edge or both edges. When using the input interrupt function high speed operations can be detected on the input which would normally be missed on a normal I/O scan.

Sample application Elevator position control Incremental encoder can detect the position and the floor where the box of cage locating to do multiple sections of deceleration. Then, use photo sensor and stop plate to detect cage stop signal and issue a high-speed interrupt to immediate stop the cage precisely.